refactor: dcloud 目录改名为 unicloud

同步 README 中的 crontab 安装路径引用。

Co-Authored-By: AtomCode (deepseek-v4-flash) <noreply@atomgit.com>

unicloud/README.md

@@ -0,0 +1,26 @@
+Preparation:
+
+```
+npm i
+npx playwright install-deps
+npx playwright install chromium
+```
+
+Run the script with:
+`node renew.mjs 'EMAIL' 'PASSWORD'`
+
+you can also set environment variables directly:
+`HEADLESS=true UNICLOUD_EMAIL=... UNICLOUD_PASSWORD=... node renew.mjs`
+
+or set via `.env` file.
+
+Add to crontab to run automatically:
+
+```
+# Renew DCloud uniCloud free-tier subscriptions.
+# Runs at 1:00 on the 26th of every month.
+#
+# Install with:  crontab /Users/Shared/product-产品/opx/sysconfig/unicloud/crontab.txt
+# (That replaces your whole crontab; use `crontab -e` to merge with existing entries.)
+0 1 26 * *  source renew_all.sh >> /tmp/dcloud-renew.log 2>&1
+```